CLASSIFICATION OF PROTOCOCCUS. 



Kingdom Plantie, because it possesses a cellulose wall, absorbs C0 2 and evolves 0. 

 Sub-Kingdom Thallophyta. 

 Group AlgiB. 



CHARA. 



FIG. 1 (a). Showing 



. f Nodes (L. nodus, a knot). 



( Inteinodes (L. inter, between). 



. [ Leaves arranged in whorls. 



APPENDAGES &amp;lt; 



( Branches. 



I Nodes. 



BRANCH . . &amp;lt; Internodes. 

 ( Appendages. 

 Nodes with their leaves. 



TERMINAL BUD , , 



Short internodes. 



FIG. 1 (l&amp;gt;). Showing the CORTICAL LAYEE INVESTING THE INTERNODAL CELL (L. cortex, Lark). 

 FIG. 2. TRANSVERSE SECTION OP INTERNODE. Showing 



Cortex. 



Wall of internodal cell 



Protoplasm lining the wall, the so-called primordial utricle (L. primordim, original ; utrifiilin, 

 a little bag). 



Chlorophyll granules arranged so as to leave an uucoloured portion, the neutral lino. 



Inner layer of protoplasm the moving layer. 



Vacuole, filled with cell-sap. 

 FIG. 3. Showing the NODE 



A surface of cells one layer thick. 

 FIG. 4. THE TERMINAL BUD DISSECTED TO LAY BARE THE GROWING POINT. Showing 



The hemispherical apical cell. It grows in length and multiplies by division transverse to the axis. 



The cell immediately beneath apical cell afterwards divides transversely into two portions the 

 lower an internode, the upper a node. 



The internodal cell (blue). It elongates, but does not divide at all. 



The nodal cell (uncoloured). It does not elongate, but divides parallel to the axis, so as to form 

 a transverse partition of cells. 



Nodal cell originating a young leaf. 



Nodal cell originating the cortex. 

 FIG. 5. PORTION OF LEAP. Showing 



The uncovered apical or terminal cell. 



Nodal cell. 



. f Descending lobes. 

 Cortex \ 



[ Ascending lobes. 



FIG. 6. MOVEMENTS OP THE PROTOPLASM 



The arrows represent the direction of the currents of protoplasm. 

 The uncoloured bands are the neutral lines (see fig. 2). 



DIAGRAM I. Showing FORMATION OP CORTEX. 



The peripheral cells of the node (shown in fig. 3) send pockets upwards and downwards to 

 form the ascending and descending cortical lobes. 



